Code Geass: Akito the Exiled is set for release on DVD/Blu-ray in Japan on the 29th, and it looks like the PR department is in full swing. Check out some of the artwork located around Akihabara and Ikebukuro:

Those signatures on the character posters are from the voice actors.

The OVA is set to take place in Europe between seasons one and two. It follows a freedom fighter named Akito.